Polyurethane Shooting Target with Self-Healing Body
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Solution Overview
Problem
Current shooting targets, made of materials like wood, paper, foam, and most plastics, are not durable and quickly degenerate when repeatedly fired upon, lacking the realism and durability needed for training and recreational shooting.
Innovation Solution
A target body made of polyurethane, with a durometer of 5 to 45 Shore A, designed to withstand multiple shots and mimic animal shapes, featuring post assemblies and wheels for mobility, and capable of self-healing to allow bullets to pass through.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional materials like wood, paper, foam, and plastics are used for targets, then the targets can be easily manufactured and provide realistic appearance, but they quickly degenerate and lack durability when repeatedly fired upon
Solution Approach 1:
The patent applies parameter changes by transitioning from traditional soft materials to polyurethane foam with specific density ranges (1-40 kg/m3, preferably 5-20 kg/m3) and Shore A hardness (20-80, preferably 30-60). This parameter optimization allows the target to withstand repeated gunfire while maintaining realistic deformation characteristics for training purposes.
Solution Approach 2:
The patent uses composite material construction by combining polyurethane foam core with outer layers of different materials including fabric layers, self-sealing layers, and optionally metal plates or Kevlar. This multi-layer composite structure provides both durability against gunfire and realistic target characteristics.
2Reliability
If self-sealing layers are added to allow repeated use, then the target can withstand multiple shots, but arrows become embedded in the target body requiring removal that could damage the target
Solution Approach 1:
The patent implements beforehand cushioning by placing a self-sealing layer (such as elastic material or liquid-filled bladder) between the fabric outer layer and the polyurethane foam core. This pre-positioned sealing layer automatically seals bullet holes as they pass through, preventing structural damage before it occurs and eliminating the need for arrow removal.
3Reliability
If the target body is made denser to withstand more shots, then durability improves, but the target becomes harder to move and adjust
Solution Approach 1:
The patent optimizes the density parameter of polyurethane foam within a specific range (1-40 kg/m3, preferably 5-20 kg/m3) to achieve the right balance between durability and mobility. This controlled density provides sufficient shot resistance while keeping the target weight manageable for repositioning during training sessions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The polyurethane target body demonstrates exceptional durability, withstanding approximately 3,000 shots and providing a realistic animal-like shape, while maintaining structural integrity and allowing for easy movement and adjustment.
Implementation Method 1
capable of self-healing to allow bullets to pass through
Implementation Method 2
withstanding approximately 3,000 shots and providing a realistic animal-like shape, while maintaining structural integrity
Data Source
AI summary
Long-lasting targets that can be repeatedly used (e.g., shot with a firearm) are disclosed. In some embodiments, the target includes a base that optionally has wheels, at least one post assembly comprising a bottom end connected to the base and a top end, and a target body connected to the at least one post assembly. Optionally, the target body is comprised of a polyurethane. Optionally, the target includes two post assemblies and the target has an expanded position for use and a collapsed position for storage. Methods of preparing targets using a mold are also described herein.